Now might be the best time since the start of the pandemic to buy a Peloton bike on the second-hand market. Listings are proliferating on Craigslist and Facebook Marketplace.

Buying a used bike is a great way to save money on a new set of wheels. There's a science to doing it on the Internet — here's your PhD course.

Used Peloton bikes are selling online through Facebook and Craigslist within hours for the same price as a new bike.